Cylinder-grinding machine.



APPLICATION FILED MAY I3, 1815.

Patented Oct. 30, 1917.

M W t/av w W\ xWK wqwwx VR fr Q m: R Wh nmr vN QW U N\\ bx 9v MG R. m% MN e ma MN WW W v 6 N RN mm gm w E. w.- CLAlR K. GY'LINDEAR GRINDINGMACHINE.

APRupATmN FILED MAY 13. I915.

Patented 00 30,1917. 1 a SHEETSS'HEET 2 7110i. Edward Clark;-

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Efw. CLARK. CYLINDER GRINDING MACHINE.

I== =Illlllllllllllllllll APPLICATION FILED MAY 13,4915.

lazines H UNITED. sures.

EDWABIP W. CLARK, 0F I10S-ANGELES, .GALIFORNIA, ASSIGNQB 0F ALVIN WELLS.OF LOS ANGELES, CALIFORNIA.

cYLmnEn-enmmns m onmn.

To all whom it may concern:

Be it known that I, E'DWA'RD W. Oman a citizen of the United Statesresiding at Iios Angales, in the count of os Angeles and State ofCalifornia, ave invented certain new-and useful Improvements in CylindenGrimling Machines, of which the following is o, specification.

'lhis'invention relates to improvements in grinding and boring machines,and especially to machines of a portable clmracter which may be placedon any of the c finders of an engine for grinding or boring te same andmay be readily moved from cylinder: to cylinder upon o multiple cylinderengine for grinding or boring all of the cylinders.

It is an object of the invent-ion to provide a. machine of the charactermentioned with a stand carrying the grinding mechanism having asufiiciently broad base to offer a firm so more, and to )rovi'de a hosetherefor upon hich the stan may bole-lumped after the grinding mechanismhas been pro erly ccntln'elil over the cylinder to be ground: the saidbase being first placed over and rigidly .fastened to the. engine orcylinder.-

It is also an object of the invention to provide-:1 grinding and boringmachine with a tool carrying mandrel adjustable to rariou-s distancesfrom-the center or axis of a crmcentrically moving outer mandrel, the ed'usting means for the tool carrying mandrel, heing capable of quickaction for a prom- ,mate adjustments, while additional no adjustmentsare secured by slower acting mechanism. V

It is a further object of the invention to 'prm'ide a grinding mechanismm-n'hich a reciprocating feed demos for moving the grinding toollongitudinally of the cylinder may be automatically reversed at theextremes: of the reciprocating movemeuts wherebv the mechanism does notrequire constant attention. I

With these and other objects. in view the invention comprises certainnovel constructions, combinations and armngemenis of parts .as will behereinafter more fully doscrilwd :mdc-la-imed. g I I In the accompanyingdrawings forming a part of this specification: .l iguro 1 iso sideelevation of a; grmdnig and boring mechanism made in accordauicd withthis invention and shown as centered over one of the cylinders of anengine, the

Specification of Letters Patent. Paltel jtd Oct.

Application filed. Kay 13, 1915. Serial No. 27,757.

. broken away and-the- PATENT orrron. 7

cylinder being broken away to'show a. grindmg'ttool in. posit-ion.

Fig. 2 is a front elevation '0'! the said mechanism.

Fig. 3 is a top plan view of the tool carrymg andoperatmg. portion ofthedevice, portlons of't 10 supporting base being shown as parts appearingupon an enlarged scale.

Fig. 4 is a top plan view of the mandrel mechnnism and showing themechanism-ct the upperend thereof for adjusting the ec-l one-mo recentrlclty of the inner or tool carrying ma-ndrel. "1

li ig. 5 is a detail sectional View upon an enlarged scale showingthefeed screw fornioving the mandrels carrying the rinding and boringtools back and forth, t io parts being upon an enlarged scale.

, Fig. 6 is an enlarged detail sectional view throu h the reversingmechanism controlling t no movement of theworm perates the mandrelraising-an lowering mechanism. A

" Fi 7 is u deteil'scctional view taken-upon the line 74 ofFi g. 6.

Fig. 8 is a longltudinal central sectioziei.

car which, i

View through the mandrel mechanism of the device, ad acent portionsofthe frame or carriage in which it is mounted being also shown.

Fig. 9 is :rvicw partially iiisection andl partially in elevation of the,automatic reversmg feed mechanism and the 'trip machanismtherefor.

Fig. 10 is' a -jdetail sectional'view' upon the line 10'-10 of'F'ig. 9.

F'g. l1 is a detail sectional view uponan enlarged scale taken upon theline l 1--11 of fcrredforms of the mechanism parts constituting theimprovements of thc prescnt intaken I Fig. 12'is a detail How insideelevation, of the. mandrel mechanismmounted upon a i eutionhare beenillustrated and the details a'ndfeatures of the invention will now be{morespecifically described with reference to "thesaid drawings. Thepresent invention is an improvement upon my previous application for aatent filed December 10, 1914, and bearing erial No. 876,487, the partsset forth in this application being adapted to, accomplish substantiallythe same results witha. more simple. mechanism and more quicklyadjustableparts. l

-Referring 'to the said 'drawin '12 indicates a base frame which may setover the cylinders 13 of an engine, the said base frame having elongatedgrids 14 adjustably connected with -end cross )ieces 15. The crosspieces 15 are. )rovide with sup orting legs or standar s -16 The endsthe pieces have elongatedslots 17 therein ada ted to receive clampingbolts 18; The ban 5 of said bolts maybe inserted in any one of theseries of slots 19 formed in the ends of the said rids 14 accordin tothe distance desired tween the gri s. .The parts are readily adjustablefor adapting the stand for use in connection with engine cylinders orother devices which it is desired to grind,'finish or bore; The grids 14are formed'jvith a large number of holes therein so that'an engine,flange may'be easily clamped thereto by clamping bolts 20. The surfacesof the grids are .made preferably smooth and true so that when the baseof the mechanism carrying stand or frame is 5 mounted thereon, theaxisof the mechanism rill be accurately perpendicular to the surface ofthe 'ds and when the said stand is centered on clamped in lpositionabove an engine cylinder-as by camping andangle brackets '22,. thecy'lin er will be accurately ound.- It will be understood that thegr1ds'14 do not require any close :or accurate adjustment with respectto each other, it only being necessary to bring them 5 approximately tothe desired positions so that the stand may be supported thereby, forproper centering as to the work to be erformed, after which it isclamped rigidly in lace. 5o djustably resting upon the grids 14 IS a.mcchanism carrying stand having a base plate 23 from which rise stoutstandards 24. The base plate 23 is accurately finished with respect tothe standards 24 so that when said ,55 base plate rests upon the uppersurfaces of the grids 14, the said standards are accu ratelyperpendicular to the surfaces of said grids. The upper ends of thestandards'24 are braced and positively held with respect. as to eachother by a curved brace yoke 25, the curved formation of t e brace beinemployed so that the mandrels below may be put in place or removed fromtheir idingmeahs whichnormally holds them.

95 in operative position between the standards;

fectly fitting the opening 26 as possible, and

disk preventing it from falling from place.

side of the pieces 32 overhang the said 'mounted in thebore of the disk27 and the bolts 21 cylinder.

late or.

-so that it is eccentric with the outer mandrel of-the grindingmechanism and so that if said opening is centered with respect to a clinder to be bored, the borin mechanism wi l'be accurately centered witirespect to said cylinder. he said base plate 23 is provided with aremovable centering attachmcnt made up of a flanged disk 27 aspermechanism adapted toextend into and engage the interior of the boreor cylinder to be ground or'finished, the flange 28 of said Dependingfrom the disk 27 is a hollow projection 29 having an enlarged endportion 30, in. which are formed inclined seats or sockets 31 tor'eceivespacing and centering pieces 32. The heads of screws 33 on either piecesand hold them movably inthe sockets 1. The inner ends of the spacingpieces 32 bear against a tapered flaring head 34 formed upon anadjilsting bolt 35 which is hollow projection 29. A thumb nut 36 appliedvto the upper rdduced threaded portion 37 of the bolt 35 is ,employedforadjusting the said bolt and by means of the fiarin head 34 thereof, thespacin pieces 32. t will be readily understood by reference to Fig. 13of the drawin s that with the centering attachment in p ace in theopening'26, and the spacing pieces 32 in the bore of a cylinder, thethumb nut 36 may be maniulated, and the base plate 23 of the mecianis'mstand shifted until all of the spacing )ieces 32, preferably four innumber, tone .the walls of the cylinder, o and the boring mechanism thusquickly and accurately centered with respect to said The base plate 23may then be tightly clamped upon the grids by the bolts 21 and themechanism will be in position for accomplishin the grinding or boringoperatlon desire. The centering attachment is then lifted from place andlaid aside.

Movabl mouhted= upon. the standards 24 is a cross lead 40 having sleeveportions 41 which movably fit upon the said standards 24. The sleeves 41are preferably provided with means at their upper and lower ends .formaking a very close fit upon the standards 24 and yet be capableofsliding back and forth thereon. Thus each end of each sleeve ispreferably provided with a bushing' 42, havin a flange 43,adapted to beheld in a 's et 44 in the end of a sleeye 130 by any suitable ineans, asfor instance ha-b hitting 45.

, 24. 'If-desired-also a gland rin 48 may be tlre mandrel is heldagainst longitudinal I y "engages an aperture 1n a stud 77 pro ectingscrewed upon the outer threa ededge of t t-he said ring 47, packingor'wicking 49 bemg held in'place between the parts and crowded againstthe standard 24, all as 'clearlyshown in Fig. 8 of the drawing. It

will -be' evident however that other kinds of packing means or glandsmay be employed-- in the sleeves 41, without de' arting;v in the leastfrom the spirit of the Invention, the one illustrated and describedhowever, being an economical and effective means for the urpose desired.

T ecross head 40 provided with an elo ated cylindrical casing. withinwhie 1 is, revolubly mounted an outer mandrel 51. The upper end of saidmandrel is provided with-a gear wheel 52, adaptui to mesh with adriving'worm 53. The upper end of said mandrel 51 usually engages abearing busliin 54 while the lower end projeets a short istance belowthe casing 50, the roj acting portion having exterior screw threadsadapted-to be, engaged by'ca ring nut 55 and a locking ringnut 56whereby movement in the casing 50. I V,

The endwalls of the hollow mandrel 5'1 are provided with openings 57'and Lidwhich accormnodate,..acyl indrical casing '59 whichcarries aninner or\ tool carryingmandrel 60. The axis of the mandrel 6G is eoincident with theaxis of the casing 59,-so that an adjustment of saidcasiug'toand from con- tool arbor and the sizoof the bore or o einterior of the cylinder that may be operated upon. In order to swingthe casing 5,9;to-

the axisof the outer mandrel 51., will ward or away from theaxialoentcr' of the mandrel 5.1, hollow yolres or quadrants; 61 and 62are pivoted ,upon the -'upper and lower ends of the-mandrel 51, the pvot .pins 63 and 64 holding the same being set outside the openings 57and 58 in'such a position that when the quadrants are swunginwardly, thecasing. 59 may be so 'moved in said 0 'enings 57'and 58 as to lei-1n theaxis of the inner mandrelinto coinci ence with the axis oftheoutermandrel 51,.and when said quadrants are swung outwardly, the sai'clca's'ing 59111113 lie-moved closer and. closer to" the peripheral wallof the outer -mandrel 51, giving the boring tool the proper eccentricadjustment to, grind or bore-a cylinder or other art1c1e to the de=siredsize.

The saidquadrants 57 and 58 afiord a means of quiclrlv adjusting theinner mil drel, and each of said quadrants is provided with a toothedrack 65 and 6(i,s"truk upon arcs with. the ins 63 and 64; as centers,the

axes of said pins being coincident; 'An ad-. ust-mg shaft 67 madesomewhatlon er than the outer mandrel 51 arid-having hearings in the endwalls of said mandrel, is provided with; ear teeth 70 and 71 adapted tomesh with t e teeth of the said-racks 65 and 66, the structure beingsuch that when a wrench or handle isapplied to the squared end 72 ofsaid shaft 67 and the shaft turned,"'the said quadrants. will be turnedupon their pivot pins simultaneously, and exactly to the same degree.The position of the inner.

mandrel with respect to the outer mandrelmay be quickly adjusted and yetwith a certainty of always preserving the parallel relation betweentl'ie'axes of the two man-. drels. In order .to obtain a further veryfine adjustment of the inncrmundrel, the

gearportion 70 of the shu'ft'fii' is elongated so as to project abovethe quadrant 61 and have a plied thereto a lever or arm 73.. One end 0said arm is usually formed with a split bandportion 74 which may" betighteued upon the gear portion 70 for turning the shaft 67, bytheapplication of a screw driver". to a. screw 75. The outer end of thearm 73 has a screw threaded aperture therein ada ted to be engaged bv anadusting screw, 6-, the other end of which oosely.

from the upper end of the outer mandrel 51.. A knurled. head 78 on theend of the said screw 76 -permitsof turning the same "to move thesaidtarm 73 .for securin shades'of ad1ustment in the shaft 6 and thequadrants 61 and 6 2," A spring 79- in-' terposed between the outer endof the arm 73 and the stud 77, and carried by the said screw 76,normally forces the arm 78 away -fi'0m the stud 77, to the-extentermitted' by the head: 78. It will be readi 37 understood that a quickalthough "fine adjustment of the inner: mandrel may to readily hadthrough the operation of the mechanismjust ,clescrihecl. Bv'looseningthe screws 75, the

shaft- 67 may be readily turned irrespective of the arm 73 for quicklythrowing the quadrants and bringing the'inner mandrel approximately tothe position des1re'cl,after which by tightening the screw 75 and masare nrranged at-the upper and-lower en 5 of said-casing. At the upper.end, the cus- ,ing;59. is provided with an exteriorly threadedendportion,extending sufiieient y above the quadrant-B1; to 'receivze aninteriorlyfi threaded flan e' of a collar =80, Within which are arrangedall hearings 81 The mandrel 13 0 60 is somewhat reduced ii -diameterwithin the bearing and' the inner n'reuibcr of said bearing is rigidlysecured thereto. The said reduced portion extends above the'said hearing81 and is screw threaded to receiye a pulley 82 by which themandrel isrotated,

a washer or spacing ring 83 being interposed between the ball bear-inand the said pulley. '7

A belt 84 of anyfsuitab e kind extends from the said pulley ;to anysuitable source of ower.

The'lower end of the casing 59, is usually fitted-in a' bearing bushing85 fitted into the lower end of said casing and'a' screw cap ring 86engaging exterior threads on the casing 59 holds the bushing in place. Aspacing ring 87 and an anti-friction .washer 88 between the'said ring 86and the is screw threaded at its lower end to on age a threaded openingin the' tapered-en B9- jof the tool shank. The upper end of the saidshaft 'or draw rod 91 has a head 02 bearing against the pulley 82. androvidcd with a s uared portion 93 by whic it may be turnc A grinding orboring tool may readily be removed or put in place by a manipulation ofthe draw rod 91. In order to prevent oil from running-upon the grindingtool, an oil cpllectm cup 94 1s preferably carried by the sham or tool,its upper e'clg usually just receiving the cap -ringr86, as clearlysiown in. Fig. S of'the drawin The difliculty heretofore experiencedwit-1 vertically arranged grinding and boring mandrels, due to therunning of the oil from the parts, down upon the'carborpndum or' othergrinding tools, is thus entn elyobvt ated.

The worm'53 which drives the outer mandrel ifs-carried by e'transyer'se'shaft 95 which engages bearings at 96 and 9'? carried by bracketsprojecting laterally from the sleeves 411, ,One end of the 'said shaft95 is usually squared at 98 to receive, wrench or socket'ed handle bywhich it can be tuned by hand when desired. Generally however, the saidshaft 95 is turned by a sprocket wheel 99 which is conne'ctedby asprocket chain -100 with another sprocket wheels need therefrom by a rod101; a pulley 102' emg adapted to turn .said sprocket wheel and'engage adriving belt 103 which extends to any slutable source of energy-notillustrated; --The arrangement is such, as will-bo-noted by reference toFig. 1 that the 'sleevesw-ll may rise and fall I to adjust. the positionof the parts temporaupon the standards 24 without interrupting thedriving of v the mandrel. A similar connection with a source of power,

. not shown, may be provided for the belt 84',

disconnected and allowed to run free thereon when desired, or when it iswished. to adjust the parts by hand, through the application of ahandleor wrench to the squared end 98 of the shaft 95. To facilitate suchaction, the shaft 95 is provided with a slot IO-l within a portion ofthe gear 99 and the outer end'of said shaft is )rorided with a bore toreceive a clutch rod 105. The outer and of the said rod is provided witha head 106 by which thcrod may be adjusted. The inner end of said rod isprovided with a cross head 10?, the ends of which project laterally intoan annular recess 108 formed in the hub of the sprocket. wheel 99, whenthe said 'rod 105 is pull-a? to the outward limit of its .n-rorement,and wh ch engage oppositely arby reference to Figs. 6 and T at thedrawing.

The bored and of the shaft 97- i-.- also pro-- vided with a doublepulley 110 -for driving; the mechanism. employed in raising and loweringthe sleeves ll and the cross head 4.0. Said mile 11.0 is usually rigidly33 cured to the st ft 95 by means of: a set screw 111,

Upon the other side of the sleeves -=H from the brackets car|- \;'ingthebearings 96 and f)? are other brackets ram-Hug hearings 11: 3 1-13, inwhich is jaurnalrd horizontal h'ans- Verse shaft 114. To the centerofjsaid sl'iaitt lli-l is secured a worm '11:) adapted 10 mesh withaworm gear wheel lllhlhe hub of which has a threaded engagement with averticalh arranged feed shaft 117. The upper endof the feed shaft 117 issupported upon the central part of the \"0kupl:lt0 '25. so that it maybe-turned therein without raising and lowering th'e'feed shaft and theupper and of the said shaft may be squared so that a wrench or handle118 may he applied therein for turning the same by hand wlu-u desirr irily. The lower and of the feed shaft 117 extends to a-poiut within ashortdistmme of the base plate-'23. audls screw threaded for the greaterportion of its length. The shaft except-when the mljushnont is by hand.does not rntatelurt thr turning of the worm gzva r I'll; through thepower (lri V011 shaft 1H and .tlio worm 11:3. causes said gr-artn travelup and doutultl'lc shaft carrying the cross head 40 with it. The. saidworn W (b i5 tion s so carries-i actuating pulleys 123- and 124:; theformer of which is connected by a mayo;

lug lQO'ongeg'es the lower fe'ce of thegear r116 suliic'iently to holdit against the bearings 121,:but not sofas. to interfere with the tirningofthe said gear, is will be readily ,ilnderstpod by reference toFig. 5 'of the rawi g One end'of. the shaft 114: is enlzirged, .a,

esri'n" 113. The sai enlarged shaft por- Bjortion 'of theenlar eme'nt,engaging the straight belt with one of the groovesfof the pulley. 110,while the latter is connected by s cross belt lfifiwith the other grooveof the said ulley 110, The pulleys 123'1n1cl 124 will t us revolve inoppositedirections and through suitziblefionnectin men-11s will rotateshaft 11% first in one lrocti on and til 811' the other. An automaticclutch mech unism is provided. for shifting the connec- 10. thus turn te shaft 114-but may be shifted tions employed for cousin the turning of.the shaft- 1 14,by means of the pulleys I23 and 124 successively. Theenlarged portion of the'shaft 114 is provided with a movable ringercollar .127. which is adeptedto shift a clutch rodflQS locatedin abore'in theory lergedf portion ofithe shaft. Theinner end- 1 oftherod128 is provided with oppositely projectingnrms iojrmin ncross head129 xi'biohgprojectthrough t c slots 130- formed inlthe onlsr'ed'portionof thehaft 114, hndsnllicient y beyond said slots to engage an. inneraminlnr groove 131 formed uponthe'shiftin eculiar-V127. The rod 123 maylongitudinally by the; movement of the collar'127. The said rod-128 alsocar-riescross' and which project from the outer faces l of the ulleys123 and-1% respectively. The

. ice

pins or rods 132'and 133 outside-the \illeys' 123 and 124 end adaptedto-beniove sons;

to'comeincontact with one or more pins134= said pins 132 hn d 133prefect through slots formed. in the enlarged portion of the shaft."lll'ainjl are spaced apart sufficiently so that when one is brought inenga-gernent with the pin or pins of one pulley, the other will be movedout of the path of thepin or pins is;

of the other pulley, {1116. vice rel ed. The outer end of the rod l'28usually projects beyond theshaft lli and is prodded with a hood 136 formoving the-rod by hand when desired. .The said shifting. rod 128 is:usually operotednutonintichlly however by the shift in [of the collar127; For this purpose a be l 'cran'k leyerlB'I- hsiving n,- pinand slotengagement at 138 with the collar 12?. is mounted upon a bracket 139which p'r'oJe'cts from the-brncketecarrying the bearing 113.

5H0 and'so es'to eggs 140 ends of the seidgs rings 1% and 14 5 .are, ifastened-to end-held I The shifting coller"127 is positively-held oneondifio'ffthe bell later projects v ici'ank; ever slotted at 143 so as'to reeeiye the said.

spriri 14% and 145 carried by said r 0 r0 is fixed u we mechanism stand,itshfiezrehd beingfnstenedto-the biisc filate23 'while its u' r endfastened to t e yoke plate 25. 'llie trippmgmeteor-projections. .141 and142' are ozu'ric by sleeves 146 and-147 which are clam edindesiredpositions iipon the rod by the said sleeves.-

y. suiteble set screws, and the outer in its shifted positions by latchpieces 148 and .149, which are carried by rock shafts 150 and 151. Thesbaft150 is provided with as a longitudinal. contralbore extending ins,wardly from one end thereof to etmns verse segmental slot "152 arr:

ed eliant"- oentrally of the Ian 11 of the sari gshaft. "A" rod ors'mallci' slm 153 carried-by *a stud 154 on 'ithe bearing. 113, rojeotsintothe an aFeI-ture in said smaller shzift 153, where-'- by he rockingmovement of thesliuit 150 is'limitecl'. The ,outereiiddf'the-shaft 150carries anoperatin arm 15,? having 'a broad endportion 15 6 adaptedtof'strike the pro qection 'Tlj tQiwhen the grinding mechanism msresched'the'lowor extreme of its movement and the shaft l50 will berocked so as,

to turn the latch piece 148 out of the way 190' I b0re=of said shaft150, an -a M168 -is in serted through the slot 152 an screwed into ofthe shifting: collar .127 and permit-the l bell crank 137- to throw -thecollar to the other extreme of its inorement'l" The spring 145. willhave been compressed by the de .19

scent of the bell cralnk lever, before the lstch',

"Piece 148, released the collar 121', so that the )ell crank will shiftthe collar tithe 'posi-H tire throw under-the impulse of the spring 145.The collar will be ceughbby'the'roclci ing latch piece 149 curried bythe shaft .1515] One end of the said shaft 151 is reduced in' diameterandinserted irran a ertnre in s. stud 157 also carried by the eormg"113.;

The outer end of the shaft 151, is provided with an arm 158 whichextends into slinement with the triplprojectionl-il spring 159 ismounted upon a reduced pro ection of said shaft 151' and is connectednt'its' inner-end with eiprojection' on the :ii'ni.158,'

the said spring tending to lifttho saidnrrn a'nd to rock the latchmember 14.9 into pos tion for holding the collar 127 in one ofits.

- adjusted positions. It will be noted in this connection that thecollar holds the hitch proieotions from bein rocked into latching gagingthe peripheral surfaee-ofithe said collar, until it has been movedfar-enougheither way to permit' the latches to snap immediately throwthe I the other,

' thediamond may' be accurately adjusted;

other instance.

work and started downwardly in a ried eter ring 162. Th

the-gasket SS'in.orderto be able topast its edges, under weight of thearm 155 under the action of the spring 159 in the When the boringman'drels havc'mored to their upper positions between thestandards2i,the bell crank lever will first compress the spring 144: and then thetrip projertionl-ll will'be engaged by the arm 158 for rocking the latchpiece 149 and releasing the collar 127.

collar to the other extreme 0 its movement, with a snappy action underthe impulse of the springlei.

y means-of the mechanism 'just'clescribed, the boring or grinding toolmaybe set to cylinder.

hen the tool has passed downwardly through the-cylinder, the trippindevices set forth will automatically shift tie collar 127 and the rod128 whereby the shaft-114 will lie released from engagement with one ofits driving pulleys and be-connected with whereby its movement will bereversed andthe' grindim or boring tool will be carried upwardlyliroug'h the cylinder again. Thus the reversal of the grinding mechanismwill= be automatically accomplished, and no harm can come to themechanisin'fo'r lack of attention on the part of an attendant.

'vided .with a diamond for keeping the periphery of the grinding toolsemployed even and true. As shown in Figs. 9., 3 and 1*; of the druwings,a diamond device-is mounted uponlhe base plate rying stand, said diamondas 160 is carablyinserted in-a double sleei'eor microme inner portion ofthemicremet'er ring provided with exterior screw threads adapted toengage the interiorly. threaded {surface of a 'micrometer screw ".163. 1One end of the micrometer screw 163 is exteriorly threaded and engagesa-threaded aperture'in a stud 164 winch rises from the base plate 23.'The smooth end of the micrometer-screw is prorided with a-longitudinallyarrangedfscfle and-thebeveled edge of the micrometer ring isproi'idedwith an nnn'uiarscale so that to a. very fine degree. The diamond can beset so as to true'the grinding tools from time to time as willbc'readil-y understood by reference to Fig. 14' of the drawings.

Thc mounting-o' the inner mandrel and the cylindrical casing moved .fromthe outer mandrel and used for grinding purposes where an eccentricmotion is-not required, as in-the case of a lathe. "It. isonly-necessary to remove the cap ring 86 and slipofi' the washer 87 andthe impulse of the' in one instance, and

m a, horizontal position for The bell crank will ,as shown in Fig. 1.

23 of the mandrel can by a rodor stem 161 which is remov-' wardlywithinfrom the cy unclnmpcd and centered quickly over anabase' adaptedto beelamped 59 carrying the same,' is such that the parts-can be veryeasily ;re-

= of the grinding with- I 1,344,voa

draw the casing 59 endwise from the outer mandrel and from the quadrants61 and 62, the boring too] with its oil on having of course, been firstdisconnect from the mandrel 60. The casing 59 may then be put into anordinnrysleeve clamp 165 upon the bed of alathe 106 as shown in Fig. 12,and any kind of a grinding tool may be 0 rated grin ing or boring anarticleturned by the head of a. lathe. The ring,86 is of course screwedupon. the end of the casin 59 again to hold thebushing85in )lnce.headaptabilityof the tool mandrel to vertical or horizontal use willthus be evident.

' The operation of the various portions of the device will ,be readilyunderstood from the above description. In usin 'nism on an ordinaryautomobi e example, the c linclers of the clamped upon tie other side ofengine for engine are the grids 1; v The mandrel carrying stand is thenmoved into position upon the upper faces ofsaid grids and the centeringonce is put into the opening 26 in thel asc plate 23. After themanipulation of the centering device to accurately center the mandrelmechanism over the cylinder to be ground, the centering device isremoved after having clamped the base plate 23 tightly upon the gr ds.The'inner mandrel is then adjusted to give the boring or grinding toolthe the belt 84 is set m operation. The belt 103 is also set inoperationfor actuating the reversible feed mechanism by which the grinding toolis moved downwardly and then upthe cylinder one or more times. Therindi'ng tool is then withdrawn i indcr and the base plate 23 is othercylinder, the operation being rcpea ted. v he automatic operation. ofthe feed mechanism saves the time that would'be required, by theconstant need ofa-ttention of an operator. many of the details ofconstruction may be altered without dc art-ing from the s irit of theinvention. lhe machine is sim' c in structure and easy to 'move fromcylint or to cylinder so that a number of cylinders can be accuratelyground and finished in-a short space of time. What is claimed is:

1. A portable grinding mechanism having upon an. article to be ground, amechanism stand adapted to be shifted with respect to the. sa-idbasc forcentering it upon the article to which the base is clampcc 5 thefittingofthe stand upon said base insuring the accurate movement propereccentric movement and It will be evident also that' the mechatrialswith respect to the work, and-means for holding and operating I thegrinding tools.

portable "jiinc'ling mechanism (:OlIl-' i a mechanism may be adjusted, amechanism stand having abuse adapted to fit accurately up'onthe face ofsaid 'grid and vadapted to move-over the same for-centerm the grindingmehanisiii with respect to th be ground, means for clamping thc stand incentered position upon saidjgrid and mechanismcm'ried by said stand foraccomplishing the grinding end boring of the work carrled'by Said; grid.I i

3. A grindin liic'chanism having aftool rotating. and editing mandreldevice, a stand carrying the same and having a base accurately finishedin a plane at right angles'to the axis'of the mandrel clei'ice'and awork supportin base frame having a stand supporting grid n'pon which'thestand may be clamped for holding it "accurately with respect to the avercarrying the same, a' work supporting frame haying adjustable aperture-dplates thereon means for clamping the shifting stand upon said plates inaccurate relation to the work. 5.- A portable grinding mechanismcomprisin abuse frame'having end standards with s Otstherein, aperturedplates hav ng slotted portions adapted to. be' adjustably clampeduponsaid end standards and having apertures permitting of the clampingof articles to be bored, to said plates, a tool o erating mechanism, astand adapted to slide upon saidaperturedplatesfor center ng the tooloperatlng mechanism with respect to the articl'eto be bored and meansfor-clamp ing the said s'tand upon saidapei'tured Plates 6. A grindingmechan sm comprlsing a ortable stand having upright guldes and a liaisecarrying, the same and arranged at right-angles to said guides, a grosshead adjustable on said" guides, means for raising and loweringgthecross head on said guide, a tool operating mandrel mecl-ianism-cerriedby said cross head, means for operating the:

same,and means for holding the portable stand upon an article-tobeground, the hold- .in 0f the stand base accurately upon the saidarticle, insuring anaccurate movement of the grinding meanswlthrespect'to said article.

I ture and having means projecting into a 0571- te im"- r s ture' in-jhebase 1) ate into coincidence'm-th. 6 5

7. A grinding mechanism having aiool rotating mcchu-nism,a base platecarrying the said mechanism and having an aperture -,cen ter e d =with'respect thereto, centering device adep tedto t in'salcl spar:

the center of the ups;-

the air'is 'oithe cylinder; wherebythejtoo'l e article to affording atrue surface rotating mechanism will be properh cen-.

tered for operation within the o"1m.der," and a supporting rid clampedto t e article to V a be ground an affording an accurate surface- .toreceive said base plate;

-8. A grinding mechanism having a shifting base, means for clamping thesame with 1 respect-to an article to be ground, standards rlsmgfrom saidbase, a cross head adjustable'upon said standardshaind. carrying amandrel mechanism, a feed mechanismfor p raising and lowering themandrel mechathe said feed mechanism. .c

9. A. portable grinding mechanism having a frame adapted to be held overthe article to be ground, upright standards secured to nism andmeansforautomatically reversing said frame, a feed shaft suspended fromsaid fstandn-rds, a cross head adapted to 'be raised and lowered uponsaid standards and operated by said shaft to a predetermined posi-r' by,said cross head.

tion and a tool driving mechanism carried 10. ,A portable grindinmechanism having a standard framea' a-ptcd to be held over thea'rti'cle' to be ground. and having upr ght gu des, a cross head movableupon upright guides and automatically-operated A means for lowering andraising the cross head toI-a predeterminedextent ands tooldriving'mechanism, means for limiting the,

ried by said cross head.

prising a portable stand having rights therein, a mandrel anec ab 0 uponsaid up'r'ights andh'aving guidi-n sleeves. engaging the same, a mandreturning shaft ournaled upon said sleeves,

a feed operated shaft upon said sleeves,

,move'ment of'saidmandrel mechanism car- I I 105.; means -for operatingthe mandrel turning shaft, means for communicating moveoperated bysa-id'feed shaftfor raising and "lowering thema-ndrebm'echenisxn andmeans for reversin the rotation of the feed screw.

cin'ent from said shaft for, turning the nee shaft ineither direction, afeed screw ing a tool carrying mandrel,-an,outcr mandrel supporting thesame, means thereon for obtaining a nick adjustment ofthe tool earryinman rel with respect to 'theaxis'of" l the sai outer mandrel, auxiliarymeans tor. obtaining an additional. fine adjustment of f the toolcarrying mandrel and means for re- .tating the said mandrels.- I 13. Acylindergrinding mechanism comrising an outer mandrel having'openings 1nthe ends thereof ior aiccqmmodaltin an eccentric, ad ustment ofan-mner-man rel,

an'inner mandrel movable in-,s'a id.open ings pivoted members upon theouter mandrel tor swmging'zthe said pivoted members.

adapted to move the inner mandrel-i0 and from-the axis-ottheoutermandrel, means simultaneously to secure the proper adjustment of theinner mandrel, means for retating the outer-mandrel for giving the innermandrel ail-eccentric throw and means for rotating the inner mandrel foroperating a grinding or boring tool.

14. A grinding mechanism for c'linders comprising a tool carryingmandrel, an outer hollow mandrel carrying the same, quadrants pivotedupon theouter mandrel and carrying the inner mandrel said quadrantshaving segmental racks thereon, a. shaft havin gears adapted to engagethe racks of said quadrants simultaneously to adjust the tool, carryingmandrel with respect to the outer one, an arm adapted. to be c amped tosaid shaft for further adjusting the quadrants, meansfor adjusting andholding said arm, and means for operating the said mandrelsu 15. Acylinder grinding machineahaving an'outer mandrelland an inner toolcarrying mandrel and means for swinging the inner .mandrel from a centeroutside the axis of the outer mandrel-for moving the inner. mandrel awayfrom or toward the axis of the outer mandrel, and thereby alter therange ofmovement of the inner 'or tool carrying mandrel;

16. A cylinder grinding machine having an outer mandrel 'and aninner'tooi carrying mandrel, means for swinging the inner mandrel towardor a i'ay from the axis of the outer mandrel from a point outside thesaid axis to vary the eccentric position of. the tool carrying mandreland means for hold-' ing the inner mandrel its adjusted posi- 17.. Acylinder grinding machine-listing an outer mandrel and an inner mandrelextendin through the same, rings pivoted upon t ieiendsof the outermandrel near the.

periphery thereofand having apertures for receiving and holding theinner mandrel,

sar rmgs having segmental racks upon vtheir edges a shaft journaled inthe ...ids

. the outer mandrel and having ears 'ifonued '--upon the ends thereof tomes no end clamped thereto after the adjusted approximately to portionof the shaft at one an arm adapted to be rings have been ks the eartlrereo f lmv n'v tions, and a. screwfor operating the said arm forobtaining very finedegrees of adjustment ofth'e inner-mandrel.

18. A; cylinder riri'ding machine having an-outer mandre an innermandrel for operating grinding or boring tools, a casing bearings for.revolubly mounting the same, guadran'ts upon each end of saidcasinghavmg projections pivoted upon the ends of the outermandreloutside the ms of the some, foradjusting the said casing and, the innermandrel toward or away-.5 from the 08.315 of adjustments of the saidcasing:

with said the desired posi e inner mandrel and having iiig-a -supporting1 casing movable therein, tool operating maunortine mar 'mmmhl on Saidteed the outer mandrel whereby a suitable gymtory movement may be drel,gear teeth upon said quadrants, a shaft having corresponding meshin gearteeth for moving the quadrants simuFtaneous-ly, an adjustable armadapted to turn said shaft whereby approximate adjustments and then offiner degrees may be had of the inner mandrel and means for removablyholding a grinding tool on said inner mrndrel.

given the inner man-' 19. A cylinder grinding machine having anydrippings of oil from the mandrel mechanism and prevent the same fromreachiin the grinding tool-when the tool is operated in verticalposition.

20. A cylinder grinding mechanism ham ing an outer mandrel and an innermandrel. acasing carrying an inner mandrel and adapted to be adjusted toconcentric and eccentriepositions with respect to the axis of the outermandrel, a .gear for turning the outer-mandrel, an actuating wormmeshing therewith, a shaft carrying said worm. power means for turning},saidshaft. the said means being capable of accommodating itself todifferent positions in which the mandrel may be operated a pulleyconnected with the inner mandrel and means for driving it also capableof accommodating itself to the mmementso'f the inner mandrel.

21. A cylinder grinding mechanism cone prising a frame havingvertiealguidcs. a casii'ig adapted in more longitudinally with respectto said guides. a feed screw extending parallel to the, direction of:movement a gear moving on said feed screw and having a bearing upon saidcasing and means for turning said rear to move-the casing back and forthalong said feed screw.

22. A cylinder grinding mechanism havdrel carrying casing movable insaid stand tool operating mandrels in said casing, a feed screwsupported in said stand. a gear engaging said feedscrew and morublysupporting thes id casing thereon, a worm engaging said gear, a shaftcarrying said \vorm'and meehanismrapable of turning the said shaft firstin one direction and then the other for raising nnd'lou'ering the saidcasing.

A cylinder grinding mechanism havstand, a mandrel carrying dr'els insaid casing-a depending feed screw supported upon said stand, a casingsups rw;

worm for operating the gear to raise and lower the casino. a shaftcarrying said worm. a plurality oii pulleys carried by said shaft anddriven in opposite directions.

means for connecting one or the other of said pullers with said shaft,-aceordin" to the direction in which itiisto be turned for raising orlowering the casing and means for turning lhe said pulleys in oppositedirections with respect to each other.

24. A. cylinder grinding mechanism having a supporting frame, a tooloperating mandrel mechanism movably mounted thereon, gearing for movingsaid mechanism in said frame. a shaft for operating said gearing,oppositely driven pulleys on said shaft, shifting means for connectingthe said shaftwith one-0r the other of the said pulleys and a tripmechanism for accomplishing the shifting of said means.

25. A cylinder grinding mechanism ha?- ing a supporting frame, a tooloperating' .mandrel mechanismadapted to be moved up and down said frame,a feed mechanism for raising and lowering said mechanism, a shaft. foroperating said feed mechanism and having alleys thereon capable ofturn-. ing thesha t in opposite directions, means 'for driving thepulleys in o3posite directions, areclprocating clutch at a ptedtoconnect the pulleys with the said shaftat difnism, ashaft for operatingthe same, actuating )ulleys looselv mounted on said shaft, a mec ianismfor driving said pullers-1n opposite directwns, a reciprocatmg clutch,memher, a collar for moving the same, a

lever 'for moving said collar, springs for actuating said lever toinsure a complete, throw of the collar and clutch in either direction,detcnts adapted to hold the collar :11 its adjusted positions and trip)ing means for moving said detents'. andre easing the collar inautomatically shifting the said clutch and reversing the movement of thefeed mechanism.

D 27. A cylinder grinding mechanism havmg a supporting frame, a tooloperating mechanism adapted to moveup and down in the same, a feedmechanism for raising and lowering the tool operating mechanism, a shaftfor drivin said feed mechanism, pulleys oppositely crivcn on said shaft,a clutch mechanism for alternately connecting the pulleys with saidshaft, a bell crank lever for shifting said clutch, rocking de" tentsfor controllmg the clutch, a trip device carrying rod in said frame,trip devices adapted to rock the'said' detents when the movement of thetool operating mechanism on the frame is to be reversed, and-springsupo'n said rod adapted to be compressed alternately by the said bellcrank lever in.

"its upper and lower' positions for insuring a proper throw ofthe-clutch mechanism.- '28. A cylinder grinding mechanism hay ing amechanism carrying stand, a mandrel mechanism for oneratin a grindingtool and adapted to be move up and down in .said stand, gearingforrotating the mandrel mechanism, a shaft for operating said gearing. adouble ,iowertran sm1tt1 n pulley on said shaft, a feed mechanism ormovmg the mandrel mechanism up and down in the frame, a counter shaftfor operating said feed mechanism,-independent pulleys mounted on saidcounter shaft, a strai ht, belt connecting'oneof said pulleys with t e.

said double pulley, a cross belt for connecting the other independentpulley with said double pulley, and meansifor connecting one or theother of the independent pulleys with t the said counter shaft inaccordance with the direction in which it is to bejdriven for raising orlowering the mandrel mechanism. In testimony whereof, I have hereuntoset my hand, in presence of two witnesses.-

, EDW'ARD \V. CLARK, lVitness'es: r

Casssmi Severance, EARLB R.'POLLABD.

